Synthesis and characterization of feo nanoparticles by hydrothermal method

Abstract

FeO nanoparticles were synthesized via hydrothermal method and calcinated at diverse temperatures (400 °C, 450 °C, and 500 °C). The prepared samples are characterized by various techniques. Crystal size obtained for different annealing temperatures is 21, 14, and 8 nm, respectively. With an increase in temperature for annealing, the intensity of peaks has increased. SEM images note that with normal morphology, the samples have spherical. The average size of particles has obtained by SEM, which are matching with crystalline size obtained by XRD. UV absorbance results at 388, 392, and 399 nm are confined to the blue emission of wavelength. The edge of the optical bandgap towards the region of moving blue wavelength, which can be recognized at higher temperatures to decrease the FeO nanoparticles bandgap.